Joseph deaw hathaway



J. n. HATHAWAY.- y COVER FOR FUSES 0F PR01ECTILES.

APPLICATON FILED MAYJ. |917A Patented Aug. 12, 1919.

sarns 'PATENT onruCE.

JOSEPH DEAN HATHAWAY, OF MONTREAL, QUEBEC, CANADA.

COVER FOR FUSES OF PRQJECTILES.

Specification of Letters Patent.

Patented AuO. 12, 1919.

Application led May 7, 1917. Serial No. 167,087.

v close the fuses ofv projectiles and protect is, upon the latter same from injury and dampness during storage and transportation and appert-ains particularly to thermeans of attaching such covers to the fuses.

v Fuses to which my invention specially applies are of conical form and the covers con- *form more or less thereto and are each rey movably attached to the fuse through the medium of a tearing off strip which being soldered to the rim at the base of the cover being applied to the fuse, soldered thereto to form a sealing bond which is ripped oil' to release the cover when uncovering the fuse for use.

A n obj ect of the invention is tol improve the general construction o-f fuse covers as above with a view to economy of manufacture and facility of application.

For full comprehension, however, of my invention reference should be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate the same parts and. wherein:

Figure 1 is a perspective of my improved cover;

Fig. 2 is a transverse vertical section of same as applied to a fuse; and

Fig. 3 is an elevation of the tearing olf strip.

Having reference to the drawings, the fuse cover consists of the hollow metallic cone-like member 2 and a metallic tearing off strip 3 soldered thereto.

As heretofore constructed the cover has been inclined continuously from the apex to the rim, so to apply and solder a fiat tearing off strip of sheet form flat upon the rim of such a cover the strip had to be fashioned in the curved form indicated by dotted lines Fig. 3 to compensate for the varying diameters of the inclined wall of the cover. This neces- Y sity prevented economical cutting or stamping of the blanks from which the strips are made as considerably more scrap is left after forming curved strips than uncurved ones.

For this reason and another which will be hereinafter pointed out, I have constructed the cone 2 with a wall which flares downwardly from the apex to a point 4L and continues to the rim 'in a line substantially parallel to the axial line of the fuse to be covered thus forming a substantially non'- inclined base 5. The tearing off strip is soldered at 6 to and forms a substantially parallel continuation of this base and as the latter is not inclined but presents an ap-Y proximately constant diameter a strip which as shown in full lines Fig. 3 is straight or rmcurved before application can be soldered flat thereon.

The cone with the tearing off strip attached is placed over the fuse as shown in Fig. 2 and sealed thereon by soldering the strip 3 to the fuse all around same thus insuring the exclusion of moisture which deteriorates the fuse.

The tearing oli strip is of .a length to extend completely around the base of the cone and overlap so that it can be soldered to completely surround the base and leave an end which overlapping the strip is 'soldered thereto for a portion 8 of its length and terminates in a free end 9 by which the strip may be grasped and through the purchase thus obtained ripped off froml cone and fuse and free the former. Before removal, the free end of the strip is confined beneath a keeper consisting of a finger 10 secured at one end to the cone by a drop of solder and bent down over said free end.

The above described strip confining means may be modied as desired as other and well known means may be employed, the main requirement being the arrangement whereby the separate releasing strip can be torn oli' and so distinguishing especially from certain prior arrangements in which the cone itself is torn to release same. Therefore in comparison with the tearable one, the cone 2 can be made from substantial and practically untearable metal of suiiicient tensile strength to sustain considerable shock without bending and so more eiciently protect the fuse against physical injury as well as excluding moisture. Y

This last mentioned feature is not new in itself but those covers heretofore known have presented the above described disadvantage of being inclined from apex to rim and have the additional objection of either necessitating the attachment of the tearing olf strip thereto after being placed over the fuse or oE being merely soldered to the inclined fuse body without additional support to augment the solder bond so that the latter will stand up under strain in a manner commensurate' with the strain resisting qualities of the cone.

The advantages of the strong covering cone is augmented by the described bases as the strain due to impact is transmitted'by the latter in the axial line instead of obliquely but in order tor still further add to the strength of the cover without sacriice of the advantage of applying both cone and strip as one member, I make a circumferential groove in the inclined surface ot the base or' the fuse andthus form an annular projecting shoulder l2 upon which the lower edge of the tearing off strip rests and is soldered in such position to the exterior of the fuse at 13. The shoulder l2 forms an abutment for the cover and, assisted by the transmission of the strain in the axial line through the base sustains what may .be termed the end thrust of the latter and relieves the solder bond between fuse and cover from practically all strain due to impact upon the cover and which might tend to break the bond. Furthermore the provision of shoulder l2 and tearing-oila strip upon the base of the described construction env ables the solder connection between strip and fuse to beapplied to the exterior of both fuse and strip thus providing for easy access' to the actual parts to be soldered and thereby facilitating this soldering operation.

What I claim is as follows:

l. In combination, a conedke fuse having a projecting annular shoulder near its base, and' a cover adapted to be placed over the fuse; said cover consisting of a hollow member in the form of a cone with a cylindrical base portion, and a tearing-oil'l strip encircling said cylindrical base portion and having one of its longitudinal margins soldered thereto, the'edge `of its opposite longitudinal margin resting Yupon the shoulder ofV the fuse and being soldered thereto and such strip also presenting a free end portion.

2. ln combination, a cone-like fuse having a projecting annular shoulder near its base, and a cover adapted to be placed over the fuse; said cover consisting of a hollow memberin the form of a cone with a cylindrical base portion, a tearing-off strip encircling said cylindrical base portion and having one of its longitudinal margins soldered thereto, the edge of its opposite longitudinal margin resting upon the shoulder of the fuse and being soldered thereto andV such strip also presenting a free end portion, and a keeper soldered to the exterior Yof the cone near the upper edge of said tearingbff strip for retaining the free end of such strip.

In testimony whereof, I have signed my name to this specification.

JOSEPH DEAN HATHAVVAY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

` Washington, D. C. 

